Why is my “Service Engine Soon” or “Check Engine” light flashing?
On 1996 and newer vehicles, a flashing “Service Engine Soon” or “Check Engine” light indicates a catalyst damaging misfire is present. In other words, an ignition, injector, vacuum leak or mechanical problem is causing your engine to misfire and run very badly. This misfire may also allow excess raw fuel to enter the catalytic converter. The catalytic converter is sensitive to raw fuel, and it won’t last long. The problem needs to be fixed as soon as possible before damage occurs.
